Design of Front Mold Core Pulling Injection Mold with S⁃type Valve Chamber

doi:10.19491/j.issn.1001-9278.2020.08.015

Abstract

Abstract:

According to the structural characteristics of plastic parts and the requirements of production batch, the overall layout of the mold was determined. On the basis of mold flow analysis, a pouring system combining hot runner and common runner was designed to ensure the balanced filling of each mold cavity and the automatic separation of the cold material between the plastic part and the pouring system. By designing the side core-pulling mode of the half?slider structure, a compression spring and a limiting mechanism were assembled to realize the front membrane core pulling of the mold. The small push plate pushing mechanism was designed to simplify the overall structure of the mold to ensure a reasonable and reliable ejection action. The practical production confirmed that the die structure was reasonable, and the automatic production could be realized. This design meets the requirement for the molding cycle and the quality of plastic parts.

Key words: S-type valve chamber, injection mold, mold flow analysis, half slider, front mold core pulling

CLC Number:

TQ320.66⁺2

Ligang DING, Guofei CHENG, Wenqiang WEI, Siqiao HU, Kaixiang GUO. Design of Front Mold Core Pulling Injection Mold with S⁃type Valve Chamber[J]. China Plastics, 2020, 34(8): 95-100.

Figures/Tables 12

Fig.1. S?type valve chamber

Fig.2. Gating system

Fig.3. Hot runner system

Fig.4. Grid model

Fig.5. Filling time

Fig.6. Pressure at injection position

Fig.7. Shear stress on the wall

Fig.8. Moulding parts

Fig.9. Core?pulling mechanism

Fig.10. Cooling circuit

Fig.11. The mold assembly drawing

Fig.12. The mold

References 8

1	张燕琴,刘强. 一模多种多腔塑料模具设计 [J].模具技术, 2015(1):8⁃11.
	ZHANG Y Q，LIU Q. Design of a Multi⁃cavity Injection Mould for Multi⁃shape Parts [J].Die and Mould Technology, 2015(1):8⁃11.
2	丁立刚，胡斯乔，曾道政.喷雾阀按钮注塑模具设计[J]. 塑料科技, 2017，45(7): 91⁃94.
	D L G, HU S Q, ZENG D Z. Design of Injection Mould for Aerosol Spray Button[J]. Plastics Science and Techno⁃logy, 2017，45 (7): 91⁃94.
3	戚春晓.汽车前门饰框大型薄壁塑件热流道注射模设计[J]. 塑料, 2017，46(6): 57⁃60.
	QI C X. Design of Large and Thin⁃Walled Injection Mould with Hot Ｒunner for Automobile Front Door Sash[J]. Plastics, 2017，46 (6): 57⁃60.
4	陈怀民，张远怀.气体发生器壳体模流分析及模具结构设计[J]. 现代塑料加工应用, 2018，30(1): 55⁃59.
	CHEN H M，ZHANG Y H. Simulation Flow Analysis and Design of Mould Structure for Gas Generator Shell[J].Modern Plastics Processing and Application, 2018，30(1): 55⁃59.
5	黄兆阁，王裕成，尹立，等. 基于Moldflow和ABAQUS对回形框的有限元联合仿真[J]. 塑料, 2019，48(6): 106⁃109.
	HUANG Z G，WANG Y C，YIN L，et al. Finite Element Joint Simulation of Loop Box Based on Moldflow and ABAQUS[J]. Plastics, 2019，48 (6): 106⁃109.
6	黄立东,周小蓉. BP神经网络与GA算法相结合的空调风叶翘曲均匀性优化[J]. 中国塑料, 2014，28(7): 77⁃81.
	HUANG L D，ZHOU X R. Optimization of Warping Uniformity in Air⁃conditioner Blades Through a Hybrid of Back Propagation Neural Network and Genetic Algorithm[J]. China Plastics, 2014，28 (7): 77⁃81.
7	张春彬，张织璇.基于UG的电吹风圆扁风口塑件工业造型与注塑模具设计[J]. 塑料工程应用, 2019，47(2): 82⁃87.
	ZHANG C B，ZHANG Z X. Industrial Modeling and Injection Mould Design for Circular and Flat Tuyere Plastic Part of Hair Dryer based on UG[J]. Engineering Plastics Application, 2019，47(2): 82⁃87.
8	徐文庆，肖国华，汪哲能，等. 带有内外壁特殊脱模机构的摄像机支座多板式模具设计[J]. 塑料工程应用, 2019，47(2): 70⁃75.
	XU W Q，XIAO G H，WANG Z N，et al. Multi⁃plate Mould Design of Camera Pedestal with Special Demoulding Mechanism in Inner and Outer Walls[J]. Engineering Plastics Application, 2019，47(2): 70⁃75.

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